Advertisement Jump to content
Sign in to follow this  

Changing only the Z component in VBOs/PBOs

This topic is 4976 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Is there any way, using glMapPixels, glBufferSubData, or a pbo and glCopyPixels to update only the Z component from the X,Y,Z vertex data in a VBO? Every frame I update a 512x512 grid where the X,Y components are just the homogeneous coordinates, and therefore don't change, and the Z component is read back from the depth buffer from something I render. It doesn't make sense to send the same X,Y values if they never change, but I don't see a way to send just the Z value.

Share this post

Link to post
Share on other sites
Sign in to follow this  

  • Advertisement

Important Information

By using, you agree to our community Guidelines, Terms of Use, and Privacy Policy. is your game development community. Create an account for your GameDev Portfolio and participate in the largest developer community in the games industry.

Sign me up!